[R] Real data type in FORTRAN

Prof Brian Ripley ripley at stats.ox.ac.uk
Wed Nov 8 15:13:14 CET 2000

> Date: Wed, 08 Nov 2000 11:51:02 +0000
> From: Agus Salim <a.salim at ucc.ie>
> In FORTRAN we specify real*4 data type,

Perhaps you do, but the ISO Standard specifies REAL. What that
maps to is system-specific.

> what is the equivalence of this data type
> in R? is it single?

See ?Foreign.  R does not have a `single' data type, but .Fortran
can convert a double data type with the right attribute to and from 
a Fortran REAL.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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